I chose to pin the this photo because it is a great example of shutter speed. It captures a fist going through water. I thought it was interesting because our naked eye wouldn't be able to pick up on the details presented in this photo.

This picture was taken with an incredibly fast shutter speed so that it could quickly capture the flying water droplets. The reflection adds so much more of an interesting view to this picture; because it's as if you're seeing it double.

A Photographer’s Shutter Speed Cheat Sheet as a Handy Reference for You